| 摘要 |
PURPOSE:To prevent the occurrence of raster ringing, by installing an electrostat ic shield between a horizontal coil and a vertical coil, and installing an element which cuts off a signal of the component of a horizontal deflecting signal to be fed to the horizontal coil, in the vertical coil in series. CONSTITUTION:An electrostatic shield 3 is installed between a vertical coil 2 and a horizontal coil 1, while an element 4 is installed in this vertical coil 2 in series. Crosstalk of a signal from the horizontal coil 1 to the vertical coil 2 is reduced by the electrostatic shield 3, while an oscillating current induced to the vertical coil 2 is cut off by the element 4, preventing this oscillating current from flowing into the vertical coil 2, whereby raster ringing attributable to this oscillating current is very favorably and sufficiently reduced. In this connection, an electric conductor constituting the electrostatic shield 3 can be constituted in a so-called separator for insulating both vertical and horizontal coils. With this constitution, the oscillating current is prevented from occurring, and raster ringing attributable to the vertcal coil is very favorably and sufficient ly reducible.
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